Have a look at "The Third Chimpanzee" by Jared Diamond, an updated
view of the subject matter.

>Hello.>>I read The Naked Ape when I was about 16, and it made a big impression on>me. Now at 33, I think the book suffers from many Morris's excesses, and>contains a lot of speculations. Still, I think the core of it has, well, a>kind of down-to-earth, simple, and irrefutable (huh...) veracity.>>In certains circles, however, it appears to be considered good scientific>practice to declare any idea as nonsense, if that idea had been stated in>The Naked Ape...>>Is there a reason for that? The Naked Ape itself is my only window in that>particular area; I know of no other work seriously taking on the same>subject. So are there other serious works on the same subject, no matter>what the conclusions are? Any opinions? Any comments?>>Thanks,>Fernando Raimundo>raimundo@mail.telepac.pt>